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EP1193657A1 - High security electronic payment system - Google Patents

High security electronic payment system Download PDF

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Publication number
EP1193657A1
EP1193657A1 EP01120217A EP01120217A EP1193657A1 EP 1193657 A1 EP1193657 A1 EP 1193657A1 EP 01120217 A EP01120217 A EP 01120217A EP 01120217 A EP01120217 A EP 01120217A EP 1193657 A1 EP1193657 A1 EP 1193657A1
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EP
European Patent Office
Prior art keywords
data
electronic
chip
electronic wallet
payment system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01120217A
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German (de)
French (fr)
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EP1193657B1 (en
Inventor
Helmut Merkel
Reinhold Wieland
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Deutsche Telekom AG
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Deutsche Telekom AG
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Publication of EP1193657A1 publication Critical patent/EP1193657A1/en
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/0866—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means by active credit-cards adapted therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/349—Rechargeable cards
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/36—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes
    • G06Q20/363—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes with the personal data of a user

Definitions

  • the invention relates to an electronic payment system in which means of electronic Purse and terminals for loading and paying cashless payments is handled.
  • These electronic wallets are topped up with a PIN - protected at charging terminals, the amount of money is stored in the chip card.
  • the chip card can be on Acceptance terminals are used as a means of payment, no PIN is required to debit required.
  • microcontroller which is activated after the chip card is inserted into a charging or discharging terminal by applying the supply voltage.
  • Commands secured by cryptography increase or decrease the amount of money stored in the microcontroller.
  • a cryptographically secured booking data record is generated from the command data and sent to a background system for settlement.
  • This microcontroller has a relatively large chip area. As a result, there is a risk that the chip will break when the card is subjected to mechanical stress.
  • Modifiable data contents such as the current amount of money are after each Transaction written in the EEPROM. If the card is drawn at that moment, is possibly the data content in an implausible state and the chip card defective.
  • contactless ones already exist Applications that are mainly used as access control e.g. for ski lifts be used. These contactless chips are already in use in some cases Wristwatches used. Both functions "access control” and “clock” work separated from each other.
  • the invention has for its object to offer an electronic payment system that offers a significantly higher level of security than the known methods and is very simple and advantageous in terms of availability and handling.
  • the task is solved by using a chip as an electronic wallet is for a contactless data transfer to the charging and payment terminals is designed and installed in addition to the watch module in a wristwatch.
  • a clock for internal control of the electronic wallet can be derived.
  • Communication between the electronic wallet and the terminals for charging and Payment is carried out contactlessly via antenna and encoder / decoder.
  • each Transaction requires access to the watch module to the electronic wallet to query the date and the current time.
  • the current time appears on the display.
  • the current amount of money can be called up and displayed.
  • the electronic wallet the journal data of the last x transactions, which then either can be shown on the display or read out via a contactless interface. This data could, for example, optionally in a PC software as "electronic Budget book "are processed.
  • the amount debited becomes electronic via the contactless interface Transfer wallet and appears on the display. After confirmation by pressing A control element on the wristwatch debits the amount of money. As a result, no controls are required at the unloading terminal. At the same time exclude that amounts of money "accidentally" on electronic wallets from Be debited to third parties.
  • the electronic wallet is supposed to be contactless at a charging terminal after authentication of the user, e.g. by entering a PIN.
  • too existing controls of the watch can be used so that, as with the payment process Transaction is confirmed by a clear declaration of intent.
  • the data transfer for loading / unloading is secured cryptographically using symmetric or asymmetrical algorithm performed. Date and Time also serve as variable input data when generating random numbers for the cryptographic process.
  • posting data records are created that are used for clearing are forwarded from the terminals to a background system.
  • the Microcontroller responds appropriately to a "positive" sensor message e.g. so, that all secret data is deleted.
  • all are safety-relevant Modules may be encapsulated with additional active "shielding" so that it is not possible manipulate at the interfaces of the internal modules or take measurements. Opening the battery compartment also means deleting the safety-relevant ones Data. After the battery has been replaced by the distributor, personalization is required required using the saved personalization key.
  • the electronic wallet can internal the current date and the clock module Query the time and insert both in a booking data record. In addition, checks the stock exchange application itself expires and deletes after the validity expires all stored safety-related information, e.g. Keys etc. The user will be informed in time about the expiry of the period of validity by means of corresponding display ads informed.
  • the electronic wallet can be used as a real "wallet application” such as the MFC PayCard or money card can be implemented.
  • the chip functionality would be conceivable only to be used for authentication (authenticity check) and the settlement of the Settle money through the background system. Above all, this would have an impact to the unloading terminals, which then require online access for every transaction, to query the current amount of money.

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  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Accounting & Taxation (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Finance (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Credit Cards Or The Like (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Storage Device Security (AREA)
  • Cash Registers Or Receiving Machines (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

The system consists of electronic wallets and terminals for cash loading and payment processes. The data communications between the electronic wallets and terminals for cash loading and payment processes takes place contactlessly. The electronic wallet consists of a chip for contactless data communications with a clock module built into a wristwatch and receiving electrical power from a watch battery.

Description

Die Erfindung betrifft ein elektronisches Zahlungssystem, bei dem mittels elektronischer Geldbörse und Terminals für den Lade- und Bezahlvorgang der bargeldlosen Zahlungsverkehr abgewickelt wird.The invention relates to an electronic payment system in which means of electronic Purse and terminals for loading and paying cashless payments is handled.

Stand der TechnikState of the art

Elektronische Geldbörsen werden heute in der Regel in Form von kontaktbehafteten Chipkarten realisiert.Electronic purses are nowadays usually in the form of contact Chip cards implemented.

Die Aufladung dieser elektronischen Geldbörsen erfolgt PIN - geschützt an Ladeterminals, wobei der Geldbetrag in der Chipkarte gespeichert wird. Die Chipkarte kann an Akzeptanzterminals als Zahlungsmittel eingesetzt werden, zum Abbuchen ist keine PIN-Eingabe erforderlich.These electronic wallets are topped up with a PIN - protected at charging terminals, the amount of money is stored in the chip card. The chip card can be on Acceptance terminals are used as a means of payment, no PIN is required to debit required.

Diese Funktionen in der Chipkarte übernimmt ein Mikrocontroller, der nach Einstecken der Chipkarte in ein Lade- oder Entladeterminal durch Anlegen der Versorgungsspannung aktiviert wird. Kryptografisch gesicherte Kommandos erhöhen bzw. verkleinern den im Mikrocontroller gespeicherten Geldbetrag. Aus den Kommandodaten wird ein kryptografisch gesicherter Buchungsdatensatz generiert, der zur Verrechnung an ein Hintergrundsystem geschickt wird.
Dieser Mikrocontroller hat eine relativ große Chipfläche. Dadurch besteht die Gefahr, dass bei mechanischer Beanspruchung der Karte der Chip bricht.These functions in the chip card are performed by a microcontroller, which is activated after the chip card is inserted into a charging or discharging terminal by applying the supply voltage. Commands secured by cryptography increase or decrease the amount of money stored in the microcontroller. A cryptographically secured booking data record is generated from the command data and sent to a background system for settlement.
This microcontroller has a relatively large chip area. As a result, there is a risk that the chip will break when the card is subjected to mechanical stress.

Da die Chipkarte über keine eigene Spannungsversorgung verfügt, müssen alle veränderbaren Daten, die der Mikrocontroller für diese Anwendung benötigt, nichtflüchtig im EEPROM gespeichert werden, also auch geheime Daten wie z.B. Sicherheitsschlüssel. Since the chip card does not have its own power supply, everyone has to changeable data that the microcontroller needs for this application is non-volatile stored in the EEPROM, including secret data such as Security key.

Da die Sicherheit einer Anwendung im Wesentlichen auf die Geheimhaltung dieser Schlüssel beruht, muss sichergestellt sein, dass das Ausspähen dieser Dateninhalte nicht möglich ist. Es bieten sich allerdings vielfältige Angriffsmöglichkeiten, da der Mikrocontroller extern mit Spannung versorgt wird, und die chipinternen Sicherheitseinrichtungen im spannungslosen Zustand nicht aktiviert sind.Because the security of an application is essentially due to the secrecy of this Key is based, it must be ensured that the spying out of this data content is not is possible. However, there are a variety of ways to attack, since the Microcontroller is supplied with voltage externally, and the chip-internal Safety devices are not activated when de-energized.

Änderbare Dateninhalte wie beispielsweise der aktuelle Geldbetrag werden nach jeder Transaktion in das EEPROM geschrieben. Wird in diesem Moment die Karte gezogen, ist unter Umständen der Dateninhalt in einem unplausiblen Zustand und die Chipkarte defekt.Modifiable data contents such as the current amount of money are after each Transaction written in the EEPROM. If the card is drawn at that moment, is possibly the data content in an implausible state and the chip card defective.

Bisherige Lade- und Entladeterminals bieten dem Kunden in der Regel eine komfortable Benutzerschnittstelle mit Tastatur und Display, die allerdings auf vielfältige Art durch Vandalismus zerstört werden kann. Auch der Chipkartenleser kann relativ einfach durch eingeschobene Gegenstände verstopft werden. Dadurch werden kostenintensive Servicegänge notwendig.Previous loading and unloading terminals generally offer the customer a convenient option User interface with keyboard and display, but through in a variety of ways Vandalism can be destroyed. The chip card reader is also relatively easy to use inserted objects become blocked. This will be costly Service courses necessary.

Alternativ zu den Anwendungen auf Chipkarten existieren bereits kontaktlose Anwendungen, die allerdings hauptsächlich als Zugangskontrolle z.B. für Skilifte eingesetzt werden. Diese kontaktlosen Chips werden in einigen Fällen bereits in Armbanduhren eingesetzt. Beide Funktionen "Zugangskontrolle" und "Uhr" arbeiten getrennt voneinander.As an alternative to the applications on chip cards, contactless ones already exist Applications that are mainly used as access control e.g. for ski lifts be used. These contactless chips are already in use in some cases Wristwatches used. Both functions "access control" and "clock" work separated from each other.

Die Erfindung stellt sich die Aufgabe, ein elektronisches Zahlungssystem anzubieten, dass gegenüber den bekannten Verfahren eine wesentlich höhere Sicherheit bietet und hinsichtlich Verfügbarkeit und Handhabung sehr einfach und vorteilhaft ist.The invention has for its object to offer an electronic payment system that offers a significantly higher level of security than the known methods and is very simple and advantageous in terms of availability and handling.

Die Aufgabe wird dadurch gelöst, dass als elektronische Geldbörse ein Chip verwendet wird, der für eine kontaktlose Datenübertragung zu den Lade- und Bezahlterminals ausgelegt ist und zusätzlich zum Uhrenmodul in eine Armbanduhr eingebaut wird. The task is solved by using a chip as an electronic wallet is for a contactless data transfer to the charging and payment terminals is designed and installed in addition to the watch module in a wristwatch.

Das bedeutet, Uhrenmodul wie auch der Chip werden von der internen Batterie ständig mit Spannung versorgt. Die Kommunikation mit der elektronischen Geldbörse soll kontaktlos realisiert werden. Zusätzlich sollen Informationen aus der elektronischen Geldbörse an einem Display angezeigt werden, und die Transaktionen "Bezahlen" und "Laden" mit den Bedienelementen der Uhr gesteuert werden. Ein Zugriff auf die einzelnen Funktions-module soll durch eine mechanische Kapselung der Module verhindert werden.This means that the clock module and the chip are constantly being carried by the internal battery Power supplied. Communication with the electronic wallet should be contactless will be realized. In addition, information from the electronic wallet should be on appear on a display, and the transactions "Pay" and "Load" with the Controls of the clock can be controlled. Access to the individual function modules should be prevented by mechanical encapsulation of the modules.

Folgende Funktionen sind zu unterscheiden:

  • Uhr (Funkuhr) mit Datumsanzeige und
  • Elektronische Geldbörse
A distinction is made between the following functions:
  • Clock (radio clock) with date display and
  • Electronic wallet

Aus dem Uhrenmodul (Empfang und Dekodierung der aktuellen Uhrzeit und Datum) kann ein Takt zur internen Steuerung der elektronischen Geldbörse abgeleitet werden.From the clock module (reception and decoding of the current time and date) can a clock for internal control of the electronic wallet can be derived.

Die Kommunikation zwischen elektronischer Geldbörse und den Terminals für Lade- und Bezahlvorgang wird kontaktlos über Antenne und Koder/ Dekoder realisiert. Jede Transaktion erfordert einen Zugriff der elektronischen Geldbörse auf das Uhrenmodul, um das Datum und die aktuelle Uhrzeit abzufragen.Communication between the electronic wallet and the terminals for charging and Payment is carried out contactlessly via antenna and encoder / decoder. each Transaction requires access to the watch module to the electronic wallet to query the date and the current time.

Auf dem Display erscheint die aktuelle Uhrzeit. Durch Betätigen eines Bedienelementes kann der aktuelle Geldbetrag abgerufen und angezeigt werden. Zusätzlich speichert die elektronische Geldbörse die Journaldaten der letzten x Transaktionen, die dann entweder am Display angezeigt bzw. über eine kontaktlose Schnittstelle ausgelesen werden können. Diese Daten könnten beispielsweise optional in einem PC Software als "elektronisches Haushaltsbuch" verarbeitet werden. The current time appears on the display. By operating a control element the current amount of money can be called up and displayed. In addition, the electronic wallet the journal data of the last x transactions, which then either can be shown on the display or read out via a contactless interface. This data could, for example, optionally in a PC software as "electronic Budget book "are processed.

Ablauf eines BezahlvorgangesProcess of a payment process

Der Abbuchungsbetrag wird über die kontaktlose Schnittstelle zur elektronischen Geldbörse übertragen und erscheint auf dem Display. Nach Bestätigung durch Betätigen eines Bedienelementes an der Armbanduhr erfolgt die Abbuchung des Geldbetrages. Dadurch sind am Entladeterminal keinerlei Bedienelemente erforderlich. Gleichzeitig kann ausgeschlossen werden, dass Geldbeträge "zufällig" an elektronischen Geldbörsen von Dritten abgebucht werden.The amount debited becomes electronic via the contactless interface Transfer wallet and appears on the display. After confirmation by pressing A control element on the wristwatch debits the amount of money. As a result, no controls are required at the unloading terminal. At the same time exclude that amounts of money "accidentally" on electronic wallets from Be debited to third parties.

Zusätzlich sollte es möglich sein, auch weitere Displayanzeigen beispielsweise für den Alt-Betrag (vor dem Abbuchen) und den Neu-Betrag (nach dem Abbuchen) anzuzeigen, die durch den Kunden ggf. deaktiviert werden können. (Sicherheitsmerkmal, um den verbleibenden Geldbetrag ggf. gegenüber Dritten geheim zu halten).In addition, it should be possible to also display other displays, for example for the old amount (before debiting) and displaying the new amount (after debiting) that can be deactivated by the customer if necessary. (Security feature to the the remaining amount of money may be kept secret from third parties).

Die erfolgreiche bzw. nicht erfolgreiche Transaktion wird dem Händler eindeutig durch das Entladeterminal signalisiert.The successful or unsuccessful transaction is clearly shown to the merchant by the Unloading terminal signaled.

Ablauf eines LadevorgangesSequence of a loading process

Die elektronische Geldbörse soll an einem Ladeterminal kontaktlos nach Authentifikation des Anwenders, z.B. durch PIN-Eingabe, aufgeladen werden. Auch hier sollen die vorhandenen Bedienelemente der Uhr genutzt werden, damit wie beim Bezahlvorgang die Transaktion durch eine eindeutige Willenserklärung bestätigt wird.The electronic wallet is supposed to be contactless at a charging terminal after authentication of the user, e.g. by entering a PIN. Here, too existing controls of the watch can be used so that, as with the payment process Transaction is confirmed by a clear declaration of intent.

Kommunikation zwischen Lade- bzw. Bezahlterminal und elektronischer GeldbörseCommunication between charging or payment terminal and electronic wallet

Die Datenübertragung für Lade-/ Entladevorgang wird kryptografisch gesichert mittels symmetrischen oder asymmetrischen Algorithmus durchgeführt. Datum und Uhrzeit dienen zusätzlich als variable Eingangsdaten bei der Generierung von Zufallszahlen für die kryptografischen Verfahren. The data transfer for loading / unloading is secured cryptographically using symmetric or asymmetrical algorithm performed. Date and Time also serve as variable input data when generating random numbers for the cryptographic process.

Bei den Lade- und Bezahlvorgängen entstehen Buchungsdatensätze, die zur Verrechnung von den Terminals an ein Hintergrundsystem weitergeleitet werden.In the loading and payment processes, posting data records are created that are used for clearing are forwarded from the terminals to a background system.

Sicherheitsfunktionensecurity features

Im Gegensatz zu allen bestehenden elektronischen Geldbörsen (PayCard, Geldkarte etc.) besitzt dieses Produkt keinen passiven (spannungsfreien) Zustand. Die eingebaute Batterie versorgt die einzelnen Module, also auch die elektronische Geldbörse, ständig mit Spannung. Dadurch können alle sicherheitsrelevanten Inhalte wie beispielsweise Sicherheitsalgorithmen oder geheime Schlüssel für die Anwendung flüchtig in einem RAM Baustein gespeichert werden und sind nach Unterbrechung der Spannung gelöscht. Eine Ausnahme bildet der Personalisierungsschlüssel, der nicht löschbar gespeichert jede Personalisierung (Erst- oder Folgepersonalisierung) kryptografisch absichert, um zu vermeiden, dass Fremdsoftware in das Börsenmodul geladen wird.In contrast to all existing electronic wallets (PayCard, cash card etc.) this product is not in a passive (voltage-free) state. The built-in battery constantly supplies the individual modules, including the electronic wallet Tension. This allows all security-related content such as Security algorithms or secret keys for use volatile in a RAM Block are saved and are deleted after interruption of the voltage. A Exception is the personalization key, which does not save any deletable Personalization (first or subsequent personalization) cryptographically secured to avoid that third-party software is loaded into the exchange module.

Eingebaute Sensoren überwachen ständig, ob an einzelnen Modulen manipuliert wird. Der Mikrocontroller reagiert in geeigneter Weise auf eine "positive" Sensormeldung z.B. so, dass alle geheimen Daten gelöscht werden. Zusätzlich sind alle sicherheitsrelevanten Module ggf. mit zusätzlichem aktivem "Shielding" gekapselt, so dass es nicht möglich ist, an den Schnittstellen der internen Module zu manipulieren oder Messungen vorzunehmen. Auch ein Öffnen des Batteriefaches ist verbunden mit dem Löschen der sicherheitsrelevanten Daten. Nach einem Batteriewechsel durch den Vertreiber ist ein Nachpersonalisieren mit Hilfe des gespeicherten Personalisierungsschlüssels erforderlich.Built-in sensors constantly monitor whether tampering with individual modules is taking place. The Microcontroller responds appropriately to a "positive" sensor message e.g. so, that all secret data is deleted. In addition, all are safety-relevant Modules may be encapsulated with additional active "shielding" so that it is not possible manipulate at the interfaces of the internal modules or take measurements. Opening the battery compartment also means deleting the safety-relevant ones Data. After the battery has been replaced by the distributor, personalization is required required using the saved personalization key.

Die Wahrscheinlichkeit, dass ein Chipbruch auftritt, ist eher gering, da keine mechanischen Beanspruchungen direkt auf den Chip einwirken können.The likelihood that a chip breakage is rather low, since there are no mechanical Stresses can act directly on the chip.

Die elektronische Geldbörse kann intern aus dem Uhrenmodul das aktuelle Datum und die Uhrzeit abfragen, und beides in einen Buchungsdatensatz einsetzen. Darüber hinaus prüft die Börsenapplikation selbst ihre Gültigkeitsdauer und löscht nach Ablauf der Gültigkeit alle gespeicherten sicherheitsrelevanten Informationen, z.B. Schlüssel etc. Der Anwender wird über entsprechende Displayanzeigen rechtzeitig über den Ablauf der Gültigkeitsdauer informiert.The electronic wallet can internal the current date and the clock module Query the time and insert both in a booking data record. In addition, checks the stock exchange application itself expires and deletes after the validity expires all stored safety-related information, e.g. Keys etc. The user will be informed in time about the expiry of the period of validity by means of corresponding display ads informed.

Die bei EEPROM Zellen langen Schreibzyklen entfallen systembedingt, da die Daten der elektronischen Geldbörse im RAM gespeichert werden können. Die Applikation arbeitet dadurch schneller. Es können keine unvollständigen Schreibzyklen auftreten, die zu einem "pageweisen" Kippen auf logisch "0" oder "1" führen und eine Chipkarte zerstören würden. Für die Beweissicherung werden nicht sicherheitsrelevante Daten, z.B. der aktuelle Geldbetrag, zeitversetzt im EEPROM gesichert.The long write cycles with EEPROM cells are eliminated due to the system, since the data of the electronic wallet can be stored in RAM. The application works thereby faster. Incomplete write cycles cannot occur that lead to a Guide "page wise" to logical "0" or "1" and destroy a chip card would. For the preservation of evidence, non-security-relevant data, e.g. the current amount of money saved in the EEPROM with a time delay.

Vorteile der Erfindung gegenüber der elektronischen Geldbörse als ChipkarteAdvantages of the invention compared to the electronic wallet as a chip card

  • a) Es wird kein zusätzliches Lesegerät benötigt, um den Geldbetrag anzuzeigen. Dies kann mittels dem eingebauten Display in der Uhr erfolgen. Dies wiederum steigert die Nutzung, da jederzeit der gespeicherte Geldbetrag abgerufen werden kann.a) No additional reader is required to display the amount of money. This can by means of the built-in display in the watch. This in turn increases the Use, because the stored amount of money can be called up at any time.
  • b) Die Zahlungsfunktionalität wird erstmals in ein bestehendes System, in diesem Fall eine Armbanduhr, integriert, das bereits eine sehr hohe Akzeptanz besitzt.b) The payment functionality is first integrated into an existing system, in this case one Wristwatch, integrated, which already has a very high level of acceptance.
  • c) Die Steuerung des Bezahlvorgangs an einem Akzeptanzterminal (z.B. Warenautomat) erfolgt ausschließlich mit den Bedienelementen an der Uhr. Der Anwender muss sich somit nicht mit unterschiedlichen Bedienungsabläufen verschiedener Terminalhersteller befassen. Zusätzlich entfallen für den Terminalbetreiber die Kosten für zusätzliche Servicegänge, die aufgrund von Vandalismus (z.B. Kartenleser verstopft, Tastatur defekt etc.) entstehen.c) The control of the payment process at an acceptance terminal (e.g. vending machine) takes place exclusively with the controls on the watch. The user has to therefore not with different operating procedures from different terminal manufacturers deal. In addition, the costs for the terminal operator are eliminated Additional service courses that are blocked due to vandalism (e.g. card reader, Keyboard defective etc.).
  • d) Die elektronische Geldbörse wird ständig mit Spannung versorgt. Die Sicherheitssensoren können vom Mikrocontroller permanent überwacht werden. Im "Fehlerfall" können die entsprechenden SW Routinen aufgerufen werden, da es keinen deaktivierten Zustand gibt. Sensitive Daten, wie z.B. geheime Schlüssel oder auch Sicherheitsalgorithmen können im RAM flüchtig gespeichert und im Bedarfsfall relativ schnell gelöscht werden. Die Möglichkeit geheime Daten durch Messungen unterschiedlichster Art an der Schnittstelle zum Chip auszuspähen, bzw. Manipulationen der Spannungen für Reset oder Clock sind praktisch nicht möglich, da sich die Geldbörsenapplikation in einer gekapselten Einheit befindet.d) The electronic wallet is constantly supplied with voltage. The safety sensors can be permanently monitored by the microcontroller. In case of an error" the corresponding software routines can be called because there is no deactivated one Condition there. Sensitive data, such as secret keys or security algorithms can be stored volatile in RAM and, if necessary, relatively quickly to be deleted. The possibility of secret data through measurements of different kinds Spying on the interface to the chip, or manipulation of the voltages for reset or clock are practically not possible because the wallet application is in an encapsulated unit.
  • e) Die Börsenapplikation könnte die Daten, die nach einer Transaktion geändert werden müssen, zumindest temporär im RAM speichern und dann beispielsweise zeitversetzt im EEPROM sichern. Unterbrochene Schreibzugriffe führen bei Chipkarten häufig zu Defekten. Dies entfällt hier bei einer ständigen internen Spannungsversorgung zwangsläufig.e) The stock market application could be the data that is changed after a transaction must, at least temporarily in RAM and then, for example, with a time delay in Secure EEPROM. Interrupted write access often leads to chip cards Defects. This does not apply to a constant internal power supply inevitably.
  • f) Die elektronische Geldbörse hat die Möglichkeit, das aktuelle Datum und die Uhrzeit aus dem Uhrenmodul abzufragen und bei einem Lade- bzw. Entladevorgang in den Buchungs-datensatz einzusetzen. Datum und Uhrzeit stellen gleichzeitig eine variable Größe dar, die als Eingangsdaten für die Generierung von Zufallszahlen genutzt werden können.f) The electronic wallet has the option of the current date and time query from the clock module and during a charging or discharging process in the Use the booking record. The date and time represent a variable at the same time Size that are used as input data for the generation of random numbers can.
  • g) Die Gültigkeitsdauer der elektronischen Geldbörse kann aktiv durch den Mikrocontroller geprüft werden. Nach Ablauf der Gültigkeit können ggf. sicherheitsrelevante Daten gelöscht werden.g) The validity period of the electronic wallet can be active by the microcontroller being checked. After the expiry of the validity, security-relevant may Data will be deleted.

    • Die elektronische Geldbörse kann als echte "Geldbörsen-Applikation" wie beispielsweise die MFC PayCard oder Geldkarte realisiert sein. Alternativ wäre denkbar, die Chipfunktionalität nur zur Authenfizierung (Echtheitsprüfung) einzusetzen und die Verrechnung der Geldbeträge über das Hintergrundsystem abzuwickeln. Auswirkungen hätte dies vor allem auf die Entladeterminals, die dann für jede Transaktion einen Online - Zugriff benötigen, um den aktuellen Geldbetrag abzufragen. The electronic wallet can be used as a real "wallet application" such as the MFC PayCard or money card can be implemented. Alternatively, the chip functionality would be conceivable only to be used for authentication (authenticity check) and the settlement of the Settle money through the background system. Above all, this would have an impact to the unloading terminals, which then require online access for every transaction, to query the current amount of money.

    Claims (4)

    Elektronisches Zahlungssystem mit hoher Sicherheit, bestehend aus elektronischer Geldbörse und Terminals für die Geldaufladung und den Bezahlvorgang,
    dadurch gekennzeichnet, dass die Datenübertragung für den Auflade- und Bezahlvorgang zwischen elektronischer Geldbörse und den Terminals kontaktlos erfolgt, dass die elektronische Geldbörse aus einem Chip für kontaktlose Datenübertragung besteht, der zusätzlich zum Uhrenmodul in eine Armbanduhr eingebaut wird, dass der Chip die Versorgungsspannung von der Uhrenbatterie erhält, dass die Armbanduhr als Funkuhr ausgelegt ist und mit einem Display für die Anzeige ausgestattet ist, dass die Lade- und Buchungsvorgänge von Bedienelementen an der Armbanduhr gesteuert werden, dass Datum und Uhrzeit der internen Uhr in die Buchungsdatensätze eingefügt werden und für die Überwachung zeitrelevanter Vorgänge (Gültigkeit) genutzt werden können, dass die sicherheitsrelevanten Daten auf Grund der stetigen Spannungsversorgung flüchtig gespeichert werden können und bei Auflauf der Gültigkeit bzw, anderen funktionalen Unterbrechungen automatisch gelöscht werden, dass Sensoren die internen Module und ihre Schnittstellen überwachen und bei versuchter Manipulation alle geheimen Daten gelöscht werden, und dass ein Personalisierungschlüssel nicht flüchtig gespeichert wird, um die elektronische Geldbörse gegen Fremdeinladungen zu schützen.     Electronic payment system with high security, consisting of an electronic wallet and terminals for loading money and the payment process,
    characterized, that the data transfer for the charging and payment process between the electronic wallet and the terminals is contactless, that the electronic wallet consists of a chip for contactless data transmission, which is installed in a wristwatch in addition to the watch module, that the chip receives the supply voltage from the watch battery, that the wristwatch is designed as a radio clock and is equipped with a display for the display, that the loading and booking processes are controlled by controls on the wristwatch, that the date and time of the internal clock are inserted in the booking data records and can be used to monitor time-related processes (validity), that the safety-relevant data can be stored volatile due to the constant power supply and are automatically deleted when the validity or other functional interruptions expire, that sensors monitor the internal modules and their interfaces and that all secret data are deleted when attempted manipulation, and that a personalization key is not stored in a volatile manner to protect the electronic wallet against third-party invitations.     Elektronisches Zahlungssystem gemäß Anspruch 1, dadurch gekennzeichnet, dass die Datenübertragung für Lade- und Bezahlvorgang kryptografisch mittels symmetrischen oder asymmetrischen Algorithmus gesichert wird. Electronic payment system according to claim 1, characterized in that the data transmission for loading and payment is cryptographically secured by means of a symmetrical or asymmetrical algorithm. Elektronisches Zahlungssystem gemäß Anspruch 1 und 2, dadurch gekennzeichnet, dass Datum und Uhrzeit als variable Eingangsdaten für die Generierung von Zufallsdaten für die kryptografischen Verfahren verwendet werden.Electronic payment system according to claims 1 and 2, characterized in that the date and time are used as variable input data for the generation of random data for the cryptographic methods. Elektronisches Zahlungssystem gemäß Anspruch 1 bis 3, dadurch gekennzeichnet, dass alternativ zur Geldbörse die Chipfunktion ausschließlich zur Authentifizierung des Kunden verwendet wird und die Verrechnung der Geldbeträge über ein Hintergrundsystem erfolgt.Electronic payment system according to claims 1 to 3, characterized in that, as an alternative to the wallet, the chip function is used exclusively for the authentication of the customer and the amounts are settled via a background system.
    EP01120217A 2000-09-22 2001-08-23 High security electronic payment system Expired - Lifetime EP1193657B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10048642 2000-09-22
    DE10048642A DE10048642A1 (en) 2000-09-22 2000-09-22 Electronic payment system with high security

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    EP1193657A1 true EP1193657A1 (en) 2002-04-03
    EP1193657B1 EP1193657B1 (en) 2004-11-03

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    CN113820974A (en) * 2021-08-26 2021-12-21 南京航空航天大学 A voltage asymmetric inversion device based on flyback transformer

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    CN113820974A (en) * 2021-08-26 2021-12-21 南京航空航天大学 A voltage asymmetric inversion device based on flyback transformer

    Also Published As

    Publication number Publication date
    EP1193657B1 (en) 2004-11-03
    DE10048642A1 (en) 2002-06-20
    DE50104371D1 (en) 2004-12-09
    ATE281679T1 (en) 2004-11-15

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